Discoveries and inventions of the nineteenth century (1905)
Routledge, Robert · London : G. Routledge and Sons · leaf 645
-mission have been noticed, and such experiments are repeated from timeto time with increasing success. It has been applied to many purposes insurgery and medicine. In many cases of deafness it has made conversa-tion easy. Even the passage of the molecules of gases, when diffusingthrough porous… … LIGHTHOUSES. \ 1 7H0 does not regard with interest the lighthouses which at night throw^ * their friendly beams across the sea, to guide the mariner in his course,and warn him of perils from sunken rock or treacherous shoal ? Themodern lighthouse, with its beautiful appliances, is entirely the…
Inventions
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![An illustration from Picture Posies. Poems chiefly by living authors, and drawings by F. Walker, J. W. North, A. B. Boughton [and others] ... Engraved by Dalziel Brothers (1874)](https://img.insideoutlibrary.com/img/200/bl-bl_002911096_0-132-1.webp)